Transmission-tower.



Patented Sept. 7, 1909.

TTED STATES PATEN T OFFICE DANIEL It. SOHOLE$, OF CHICAGO, ILLINOIS, ASSIGNOR TO AIR MOTOR COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION.

TRANSMISSION-TOWER.

To all whom it may concern:

lie it known that I, llim'en R. Sorrows, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois. have invented certain new and useful IHlPIOVGDlGHtS in Transmission-Towers, of which the following is a specification.

he present invention relates to a tower of the class used for supporting electric transmission conductors. It is well understood that where currents of very high voltage are carried it is necessary to at all times nmii'itain a considerable clearance between the conductor and the nearest part of the tower structure.

The object of the present invention is to provide an improved tower which will permit one of the conductors to pass through it and will at the same time meet this requirement as to clearance, and to this end the invention consists in the features of novelty that are hereinafter described with reference to the accompanying drawing, which is made a part of this specification, and in which the figure is a perspective view of the upper portion of a tower embodying the invention. 5

The tower has four corner posts A which may be said to be arranged in pairs at the sides of the tower. lie in the same vertical plane, and the two pairs of posts are parallel. The posts of each pair converge upward and meet each other.

at their upper ends where they are secured to a heavy tie-plate B. The tie plates support a cross arm C ot truss format-ion made of a pair of bent members the intermediate portions of which, between bends, are parallel while their end portions, outside of the bends, converge and project beyond the sides of the tower, the parallel portions of said members being connected by cross braces 0 and the ends of the tie plates being secured to said members adjacent to their bends. At its center the cross-arm supports a cross bar I) from which depends a suspension insulator E and similar insulators E depend from the projecting ends, respectively, of the cross-arm.

The parallel portions of the members of which the cross arm C is made up form braces which connect'the upper ends of the corner posts through the -medium of the tie plates B. The corner posts are also connected at successively lower levels by Specification of Letters Patent.

Application filed September 21, 1907.

The posts of each pair Patented Sept. *2, 1985).

Serial No. 393,920?

braces I, F, etc., and the several braces divide the tower into panels of substantially uniform shape and size. The tower lr 1" bent braces, G, in the form ot trns are arranged in pairs in connection two pairs of posts. At their bends th I secured, as shown at f, to the lioria-ntal brace, F, which is located below the upper ends of the posts, at points adjacent to the posts to which they are respectively secured, whence they converge upwardly relatively to each other, and whence each of them con.- verge both upwardly and downwardly relatively to the posts to which they are respectively secured. Their upper ends are sooured to the upper ends 01 the posts and their lower ends are secured to the posts at the intersections of the posts with the horizontal braces F, any suitable means, such as bolts or rivets, being used. Each of these braces G lies in the inclined plane of one of the posts and forms a truss for bracing and sustaining its upper portion. By their use the need for cross braces or tie rods in the panel in which the insulator ll] located obviated and the panel is left free and open so that the insulator may have the i'iecessary range of movement without bringing the conductor within the proscribed distance of any partof the tower structure.

H are tie-rods or tensile braces, each of which extends from the intersection of one of the horizontal braces 1 with one of the braces G on one side of the tower to the intersection of the nextlower horizontal brace F with one of the posts on the opposite side of the tower.

What I claim as new is:

1. A transn'iission tower having at each side a pair of corner posts which converge upward, a pair of parallel, horizontal braces connecting the two pairs of corner posts at their upper ends, horizontal braces arranged at a plurality of lower levels, the braces at each level being arranged in the form of a rectangle connecting the posts of each pair and also the posts of the two pairs, two pairs or" braces secured at intermediate points to the horizontal braces located below the hori- Zontal braces at the upper ends of the posts, at points adjacent to the posts, whence they converge upward relatively to the posts and relatively to each other, means for securing the upper ends of said braces to the upper ends of the posts and means for securing their lower ends to suitable parts of the tower.

2. A transmission tower having at each side a pair of corner posts converging upward, a pair of parallel, horizontal braces connecting the two pairs of corner posts at their upper ends, horizontal braces arranged at a plurality of lower levels, the braces at each of said levels being arranged in the form of a rectangle connecting the posts of each pair and also connecting the posts of the two pairs, two pairs of bent braces of truss form secured at their bends to the horizontal braces below the braces at the upper ends of the posts, at points adjacent to the posts, whence said braces converge both upward and downward relatively to the posts and also converge upward relatively to each other from end to end, means for securing their upper ends to the upper ends of the posts, and means for securing their lower ends to the tower at the intersections of the posts and the horizontal braces located below the horizontal braces to which the bent braces are secured at their bends.

3. transmission tower having at each side a pair of corner posts which converge upward, a pair of parallel, horizontal braces connecting the two pairs of corner posts at their upper ends, horizontal braces arranged at a plurality of lower levels, the braces at each level being arranged in the form of a rectangle connecting the posts of each pair and also the posts of the two pairs, two pairs of bent braces secured at their bends to the horizontal braces below the horizontal braces at the upper ends of the posts, at points adjacent to the posts, whence said bent braces converge both upward and downward relatively to the posts and converge upward relatively to each other from end to end, means for securing their upper ends to the upper ends of the posts, and means for securing their lower ends to the posts at the intersections of the posts and the horizontal braces located below the horizontal braces to which the bent braces are secured at their bends.

at. A transmission tower having at each side, a pair of corner posts which converge upward, said pairs of posts being parallel, a

pair of horizontal braces connecting the posts at their upper ends, and a plurality of horizontal braces connecting the posts at a .plurality of lower levels, said horizontal braces dividing the faces of the tower into panels.

A transmission tower having at each side, a pair of corner posts which converge upward, a pair of bent braces in the form of trusses secured to suitable parts of the tower adjacent to said corner posts and converg ing upward relatively to each other, and also relatively to the corner posts, respectively, a tie plate to which the upper ends of the posts and braces are secured and a cross arm of truss formation having two side members secured to the ends of the tie plates.

6. A transmission tower, having at each side, a pair of corner posts which converge upward, a pair of bent braces in the form of trusses secured to suitable parts of the tower adjacent to the corner posts and converging upward relatively to each other and also relatively to the corner posts, respectively, a tie plate to which the upper ends of the posts and braces are secured, a cross arm of truss formation having two bent side members, the intermediate portions of which are parallel and the outer portions of which converge and project beyond the sides of the tower, the ends of the tie plates being secured to the side members of the cross arms adjacent to their bends and cross braces connecting said side members.

7. A transmission tower having, at each side, a pair of corner posts converging upward, a pair of bent braces of truss-form secured at their bends to suitable parts of the tower, whence they converge upward relatively to each other and also relatively to the corner posts, respectively, means for securing the upper ends of the braces and posts together, a cross-arm supported by the two pairs of posts, and tie rods each connected at one end to one of the truss-braces at its bend and at the other end to the opposite side of the tower.

DANIEL R. SGHOLES.

lVitnesses:

JAMES P. CoNDoN, JULIA FLANIGAN. 

